Key facts
- Brand
- Maxim
- Model
- MAX253
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-04-12
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Maxim MAX253 Transformer Driver Datasheet
The MAX253 is a monolithic oscillator/power‑driver designed to provide isolated power for RS‑485 or RS‑232 data interfaces. It drives a center‑tapped transformer primary from a 5 V or 3.3 V supply and can deliver up to 1 W of isolated output power. The device includes a CMOS oscillator, a toggle flip‑flop, and two N‑channel power switches with break‑before‑make action.
Key features include a pin‑selectable switching frequency (350 kHz or 200 kHz), low‑current shutdown mode (0.4 µA), and availability in 8‑pin DIP, SO, and uMAX packages. The datasheet provides absolute maximum ratings, electrical characteristics, typical operating curves, and recommended external components such as diodes and filter capacitors.
Maxim MAX253 specifications
| Supply Voltage (VCC) | 0.3 V to +7 V |
|---|---|
| Operating Temperature Range | -55 °C to +125 °C |
| Pin‑Selectable Frequency | 350 kHz or 200 kHz |
| Low‑Current Shutdown Mode | 0.4 µA |
| Package Types | 8‑Pin DIP, SO, uMAX |
All Maxim MAX253 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What supply voltage range does the MAX253 support?
The device operates from 0.3 V up to +7 V supply voltage.
How is the switching frequency selected on the MAX253?
The frequency is set by the FS pin: 350 kHz when FS is high, or 200 kHz when FS is low.
What supply voltages can the MAX253 operate from?
The MAX253 can be powered from either a 5 V or a 3.3 V DC supply.
What is the shutdown supply current of the MAX253?
The shutdown supply current is 0.4 µA.